.eslintrc.json

{
  "parser": "@typescript-eslint/parser", // eslint to TS
  "plugins": ["prettier", "@typescript-eslint"],
  "extends": [
    "plugin:@typescript-eslint/recommended", // ts 추천 rules https://github.com/typescript-eslint/typescript-eslint#readme
    "plugin:react/recommended", // react 추천 rules. https://github.com/yannickcr/eslint-plugin-react
    "plugin:react-hooks/recommended", // react-hook 추천 rules. https://github.com/facebook/react
    "plugin:jsx-a11y/recommended", // jsx 추천 rules. https://www.npmjs.com/package/eslint-plugin-jsx-a11y
    "plugin:import/errors", // es6+ import/export syntax linting 지원. https://www.npmjs.com/package/eslint-plugin-import
    "plugin:import/warnings", // es6+ import/export syntax linting 지원. https://www.npmjs.com/package/eslint-plugin-import
    "prettier" // eslint rule과 prettier rule 충돌 방지. https://github.com/prettier/eslint-config-prettier
  ],
  "parserOptions": {
    "ecmaVersion": 2018, // 문법 지원 (기본 값으로 둠)
    "sourceType": "module" // 모듈 시스템 사용
  },
  "rules": {
    // custom 해야할 규칙 선언
    "prettier/prettier": ["error", {"endOfLine":"auto"}],
    "@typescript-eslint/explicit-module-boundary-types": "off",
    "react/react-in-jsx-scope": "off",
    "import/no-unresolved": "off",
    "jsx-a11y/no-onchange": "off"
  },
  "settings": {
    "react": {
      "version": "detect"
    },
    "import/extensitions": [".js", ".jsx", ".ts", ".tsx"],
    "import/parsers": {
      "@typescript-eslint/parser": [".ts", ".tsx"]
    },
    "import/resolver": {
      "typescript": {
        "alwaysTryTypes": true
      }
    }
  }
}